Mesa Police spokesman Ed Wessing on Sunday identified the brother as Dwight J. Brock Jr. and his sister as 16-year-old Nicole M. Brock, both residents of Mesa.
Wessing says the sister had dropped off her brother at Superstition Springs Mall Saturday evening. And then they started playing around, with the brother jumping in front of the car and the sister slamming on the brakes.
The last time that happened the sister was unable to stop and ran over the brother.
He was rushed to a hospital in critical condition and later pronounced dead.
